What size battery should I run?

darknight
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So im currently running a 15 farad capacitor...i know they serve no purpose from what I've heard but I got it a long time ago when I didn't know much about car audio I just wanted to get loud. Anyways i want to put a second battery in and I wasnt sure that size i would need. I'm runnin a 15" Fi BTL with a T20001bd wired at 1ohm. Yellow top up front.

Thanx

 
So im currently running a 15 farad capacitor...i know they serve no purpose from what I've heard but I got it a long time ago when I didn't know much about car audio I just wanted to get loud. Anyways i want to put a second battery in and I wasnt sure that size i would need. I'm runnin a 15" Fi BTL with a T20001bd wired at 1ohm. Yellow top up front.
Thanx
at least 1 g31 in the back. maybe an alt, maybe 2 batteries... trial and error....

 
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darknight

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